Re: Slow Wave Helical Resonator Experiment

Hi Antonio and All,

	I repeated the experiment with a wonderful variable high-speed
series-quench small-gap rotary gap that is on loan to me.  I WAS able to
break the primary current in the mid notch region as the Corum paper
suggests (I didn't think I would be able to do this!).  The best scope
photo I was able to catch is at:


	The gap was going and I was trying to catch the occasional "just right"
screen with the scope's stop button.  This picture was the best I was able
to catch.  It does not show the effect the Corum's spoke of in their paper.
 I saw hundreds of traces go by on the scope screen an none showed the
slightest indication of the effect...

Great fun was had however!! :-))

	Terry Fritz

At 11:10 AM 12/7/98 -0800, you wrote:
>Terry Fritz wrote:
>>         As the scope picture I posted shows, there was absolutely no
>> voltage rise. The primary circuit quenching is clearly defined in the
>> bottom trace occurring at 180uS (50us/div) on the fourth notch after the
>> initial burst began. The secondary voltage at 294uS (180+114) appears very
>> stable at ~70kV peak with no voltage rise or any evidence of the effects
>> described in the Corum's paper.
>That experimental result was (?) obtained with the interruption of the
>primary current at a maximum, not a notch (using a rotaty spark gap).
>abrupt rise in the secondary voltage was probably an induction coil
>with most of the energy in the primary circuit being transferred
>to the secondary circuit when the primary current was interrupted.
>Or maybe more probably a bad contact in the oscilloscope attenuator
>itself during the measure...
>Antonio Carlos M. de Queiroz